使用 UIImagePickerController 录制第二个视频会覆盖第一个视频录制的路径答案

【问题标题】：Second video recording with UIImagePickerController override the path of first video recording使用 UIImagePickerController 录制第二个视频会覆盖第一个视频录制的路径
【发布时间】：2017-04-28 14:15:18
【问题描述】：

我正在尝试使用UIImagePickerController 录制两个视频。一切正常，但在录制第二个视频时，它似乎覆盖了第一个录制视频的路径。
我需要将两个视频都上传到服务器，但第一个视频路径在上传时为零，并且应用程序崩溃了。有没有办法在不同的路径录制第二个视频？

视频路径如下：

/private/var/mobile/Containers/Data/Application/1465EC90-4B57-41FF-996E-0CCB7713ECE7/tmp/50332801315__A883E4DB-ED72-4D31-9564-22FB363779BD.MOV
/private/var/mobile/Containers/Data/Application/1465EC90-4B57-41FF-996E-0CCB7713ECE7/tmp/50332802324__F11733AD-EB62-426D-BA1C-7E87D2BF66D0.MOV

这是我的imagePicker 委托代码：

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {
NSString *mediaType = [info objectForKey:UIImagePickerControllerMediaType];

if (CFStringCompare ((__bridge CFStringRef) mediaType, kUTTypeMovie, 0) == kCFCompareEqualTo) {
    NSURL *videoUrl = (NSURL*)[info objectForKey:UIImagePickerControllerMediaURL];
    NSString *moviePath = [videoUrl path];

    if (UIVideoAtPathIsCompatibleWithSavedPhotosAlbum (moviePath)) {
        UISaveVideoAtPathToSavedPhotosAlbum (moviePath, nil, nil, nil);
    }

    NSLog(@"videoUrl: %@", videoUrl);
    NSLog(@"moviePath: %@", moviePath);

    // self.moviePath_1 = @"";
    // self.moviePath_2 = @"";

    NSLog(@"picker.title: %@", picker.title);
    if ([picker.title isEqualToString:@"Video_1"]) {
        self.moviePath_1 = moviePath;
        self.video_1 = YES;
        NSLog(@"self.moviePath_1: %@", self.moviePath_1);
        self.video_1_Data = [NSData dataWithContentsOfURL:[NSURL fileURLWithPath:self.moviePath_1]];
        NSLog(@"Video_1 Size: %@",[NSByteCountFormatter stringFromByteCount:self.video_1_Data.length countStyle:NSByteCountFormatterCountStyleFile]);

        [self setupAndPlayback:@"Video_1"];

    } else {
        self.moviePath_2 = moviePath;
        self.video_2 = YES;
        NSLog(@"self.moviePath_2: %@", self.moviePath_2);
        self.video_2_Data = [NSData dataWithContentsOfURL:[NSURL fileURLWithPath:self.moviePath_2]];
        NSLog(@"Video_2 Size: %@",[NSByteCountFormatter stringFromByteCount:self.video_2_Data.length countStyle:NSByteCountFormatterCountStyleFile]);

        [self setupAndPlayback:@"Video_2"];

    }
}

[self dismissViewControllerAnimated:YES completion:nil];
}

【问题讨论】：

标签： objective-c uiimagepickercontroller nsdocumentdirectory

【解决方案1】：

将视频保存在不同的路径上。您正在覆盖与此问题发生原因相同的路径。添加时间戳或使用路径增加数字并保存。

 self.moviePath_1 = [NSString stringWithFormat: @"%@-%d.png", moviePath, num] ;
 num += 1; // for next time

【讨论】：